Grunts behind the veil

Basil Kirchin (8 August 1927 - 18 June 2005) was an English drummer and composer; he pioneered techniques which are now commonplace but were considered radical at the time. These included recording sounds he came across and then cutting, splicing, slowing down or stretching the tape to create strange, new noises.

Deep tracts of the unknown

Sven Libaek (1938) is a Norwegian-Australian composer, record producer and musician. He composes film and TV soundtrack music and, as the staff producer for the Australian division of CBS Records, influenced the Australian popular music scene in the mid-1960s.

Reaching transient states of consciousness

Ali Akbar Khan (1922 - 2009) was an Indian Hindustani classical musician of the Maihar gharana, known for his virtuosity in playing the sarod. Trained as a classical musician and instrumentalist by his father, Allauddin Khan, he also composed numerous classical ragas and film scores.
He established a music school in Calcutta in 1956, and the Ali Akbar College of Music in 1967, which moved with him to the United States and is now based in San Rafael, California, with a branch in Basel, Switzerland. Khan was instrumental in popularizing Indian classical music in the West, both as a performer and as a teacher. He first came to America in 1955 on the invitation of violinist Yehudi Menuhin and later settled in California. 
He was a Distinguished Adjunct Professor of Music at the University of California, Santa Cruz.
Ustad Vilayat Khan (1928 - 2004) was an Indian classical sitar player. Along with Imdad Khan, Enayat Khan and Imrat Khan, he is credited with the creation and development of gayaki ang (an attempt to mimic the sound of the human voice) on the sitar.